Revelers sprint in front of bulls and steers during the first Running of the Bulls at the San Fermín Festival in Pamplona, Spain, on July 7, 2019. #

Revelers enjoy the atmosphere during the opening day of the San Fermín Running of the Bulls fiesta in Pamplona, Spain, on July 6, 2019. #

People cool off with water thrown from a balcony during the opening of the 2019 San Fermín Festival. #

Revelers celebrate while waiting for the launch of the chupinazo rocket on July 6, 2019. #

Paula Lopez and Diego Roldan kiss during the opening of the San Fermín Festival in Pamplona on July 6, 2019. #

Revelers sleep before the start of the first Running of the Bulls on July 7, 2019. #

People attempt to dodge a wild cow following the first Running of the Bulls on July 7, 2019. #

A wild cow enters the bullring in Pamplona on July 7, 2019. #

A participant is tossed by a cow during the first bull run of the San Fermín Festival on July 7, 2019. #

A heifer jumps over revelers in the bullring after the second bull run on July 8, 2019. #

Youngsters run with toy bulls during the Encierro Txiki, or Little Bull Run, on the fifth day of San Fermín 2019. #

A giant member of the San Fermín Comparse Parade takes part in a procession surrounded by people dressed in white and red clothes on July 7, 2019. #

A man wearing a toro de fuego, or "fire bull," chases people during the San Fermín Festival on July 9, 2019. #

Runners look at the figure of Saint Fermin before the Running of the Bulls at Cuesta de Santo Domingo on July 9, 2019, the fourth day of the San Fermín Festival. #

Participants run next to Puerto de San Lorenzo fighting bulls in Pamplona on July 7, 2019. #

Revelers reach out to touch a bull during the Running of the Bulls on July 10, 2019. #

Participants run next to a Puerto de San Lorenzo fighting bull on July 7, 2019. #

A bull from Puerto de San Lorenzo's fighting bulls enters the bullring during a bullfight on the second day of the San Fermín Festival. #

The Spanish bullfighter Emilio de Justo performs with a bull from Puerto de San Lorenzo's fighting bulls in Pamplona on July 7, 2019. #

Revelers celebrate during a bullfight on July 10, 2019. #

Participants run next to Jandilla fighting bulls on July 10, 2019. #

People run with José Escolar's fighting bulls along Cuesta de Santo Domingo during the fourth day of the San Fermín Festival. #

An injured reveler is helped by medical staff during the first Running of the Bulls in Pamplona, Spain, on July 7, 2019. #